Allen-Bradley 1746-OBP8 SLC 500 Output Module

Allen-Bradley 1746-OBP8 is an eight-channel digital DC output module for the SLC 500 family that provides high-current, 24V DC sourcing outputs. It is designed for SLC 500 racks and uses an open-style chassis, with outputs arranged as two 4-point groups that plug into a standard 1746 backplane. Each of the eight outputs can source up to 2 A at 24 V DC, within an operating window of 20.4 to 26.4 V DC. The module is documented as eight DC output points (8 DO) with high-current sourcing capability, and distributor listings consistently present it as 1746-OBP8 with 24V DC sources and 2.0 A per output. The form factor and backplane compatibility make it suitable for driving heavier loads such as solenoids, relays, and indicator lamps in control panels. Rockwell Automation notes that the SLC 8-point digital output module line, including 1746-OBP8, was discontinued as of December 31, 2022, so new sales from the manufacturer are no longer available. For proper use, verify your system is an SLC 500 rack with the corresponding 1746 backplane and supply within the 20.4–26.4 V DC range, and be mindful of the module’s status in legacy installations.